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Hi everyone,
I would like to execute a Hive query on the server in an asynchronous
manner. The Hive query will likely take a long time to complete, so I would
prefer not to block on the call. I am currently using Thirft to make a
blocking call (blocks on client.execute()), but I have not seen an example
of how to make a non-blocking call. Here is the blocking code:
TSocket transport = new TSocket("hive.example.com", 10000);
transport.setTimeout(999999999);
TBinaryProtocol protocol = new TBinaryProtocol(transport);
Client client = new ThriftHive.Client(protocol);
transport.open();
client.execute(hql); // Omitted HQL
List<String> rows;
while ((rows = client.fetchN(1000)) != null) {
for (String row : rows) {
// Do stuff with row
}
}
transport.close();
The code above is missing try/catch blocks to keep it short.
I can see that Thirft has things like "TNonblockingSocket" but I cannot find
any examples of how to use it, or if Hive even supports it. Does anyone have
any ideas how to do an async call? Is there a better way?
Thanks!
Kind regards,
Peter Sankauskas